Patents by Inventor Roy P. Barber

Roy P. Barber has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Method of monitoring temperature
    Patent number: 4643588
    Abstract: A method of monitoring if a stored product has exceeded a predetermined temperature using an assembly, which comprises coated onto a carrier a gelatin layer containing an acidic reactant, color former and an encapsulated non-aqueous solvent.
    Type: Grant
    Filed: April 2, 1985
    Date of Patent: February 17, 1987
    Assignee: Ciba-Geigy AG
    Inventors: Stephen R. Postle, Roy P. Barber